siemens
Siemens SENTRON 3WL Electrical Motor Operator (EMCO)
Model: 3WL9111-0AA01-0AA3
4-hour response · Pricing in SAR · Delivery across all KSA regions
3WL9111-0AA01-0AA3 — Siemens SENTRON 3WL Electrical Motor Operator (EMCO)
The Siemens SENTRON 3WL EMCO (Electrical Motor Controlled Operator) is a motorised drive mechanism that retrofits onto any SENTRON 3WL air circuit breaker (3WL1, 3WL2, or 3WL8) to provide remote electrical open and close operation via SCADA, BMS, or hard-wired control signals — transforming a manually operated main breaker into a remotely controllable switching device without replacing the breaker or its protection trip unit. The EMCO accepts control voltage from 24 V DC to 250 V AC, operates the breaker in both spring-charged and non-spring-charged configurations, and completes the open or close operation within 3 seconds regardless of breaker frame size.
The 3WL EMCO integrates directly with the SENTRON ETU trip units (ETU45B, ETU55B) and the PowerMon II energy management interface module, enabling coordinated remote protection, metering, and switching from a single SCADA register set. Position feedback contacts (breaker open/closed) and spring-charged status contacts provide the confirmation signals required by SCADA systems and remote operator panels to verify that commanded switching operations have been completed before issuing subsequent switching commands — the anti-pumping protection function prevents successive close-open-close sequences that could damage breaker contacts under fault conditions. The auxiliary contact positions can also be monitored by building energy management systems for integration into automatic load transfer and peak demand control schemes.
In Saudi Arabia, the 3WL EMCO KSA is increasingly specified in the Kingdom's data centres, critical facility switchgear, and smart distribution boards where remote breaker operation is required without field personnel presence. Riyadh and Jeddah hyperscale data centres operated by cloud providers specify EMCO-equipped 3WL breakers on all main distribution board incomers and bus-ties, enabling remote load transfer operations during planned maintenance and automatic supply restoration after utility supply interruptions. NEOM's smart city electrical infrastructure specifies remotely operated 3WL breakers for building electrical rooms in The Line and Sindalah island, where centralised control from the city's operations command centre is the design standard.
Razz Middle East supplies 3WL EMCO units as factory-fitted options on new 3WL breakers and as retrofit kits for installed 3WL breakers, providing full SCADA integration wiring design and commissioning services.
Technical Specifications
Full specifications for the 3WL9111-0AA01-0AA3
- Control Voltage
- 24–250 V DC/AC
- Operation
- Open/close (remote SCADA/BMS/hardwired)
- Operation Time
- <3 s
- Feedback
- Breaker open/closed + spring-charged contacts
- Anti-Pumping
- Built-in protection
- Fits
- 3WL1, 3WL2, 3WL8 (all frame sizes)
- Integration
- Compatible with ETU45B/55B trip units
- Standard
- IEC 60947-2
Key Features & Benefits
- Remote open/close operation from SCADA or BMS control signals enables load transfer, supply restoration, and planned switching operations without field personnel presence — critical for Saudi remote facilities and unmanned electrical rooms.
- Position feedback contacts (open/closed/spring-charged) provide SCADA confirmation that commanded switching operations completed successfully, enabling safe automated switching sequences in data centre and industrial switchgear.
- Anti-pumping protection prevents successive close-open-close sequences under fault conditions, protecting breaker contact system from the arcing damage that would result from repeated closing onto a persistent fault current.
- Retrofits onto installed 3WL breakers without breaker replacement, transforming an existing manual distribution board incomer or bus-tie into a remotely controllable device during a switchboard upgrade without new switchboard procurement.
- ETU45B/55B trip unit coordination allows SCADA to command open/close operations while the trip unit independently provides protection, metering, and data logging — all accessible from a single SENTRON powerconfig register set.
- 24–250 V AC/DC control voltage range covers the SCADA and BMS output card voltage standards used by all major industrial control system suppliers in Saudi Arabia without voltage conversion relays.
- NEOM smart city and data centre specification compliance satisfies the centralised building electrical room control architecture requirement for remotely operated main incomers in smart building infrastructure projects.
Industrial Applications in Saudi Arabia
- Data centre main distribution board incomer and bus-tie remote operation at hyperscale cloud facilities in Riyadh and Jeddah, where remote load transfer between utility supplies and UPS systems requires sub-3-second switching without personnel access to energised switchgear.
- Industrial substation remote incomer switching at Aramco and SABIC process plant substations, enabling planned supply transfers and emergency isolation from the plant control room without sending field electricians into energised LV switchrooms.
- NEOM smart city building electrical room remote switching in The Line and Sindalah island developments, where centralised operations command centre control eliminates the need for electricians to physically access every building electrical room for routine switching.
- Hospital emergency supply transfer scheme automation, where EMCO-equipped 3WL bus-tie and incomer breakers execute automatic load transfer to generator supply within 3 seconds of utility supply failure without operator intervention.
- Smart grid demand response integration at large commercial buildings, where the EMCO allows BMS-commanded shedding of major distribution board feeders as part of SEC demand response programmes during peak demand events.
- SEC distribution substation LV board remote operation, where EMCO-equipped 3WL incomers allow remote switching of transformer LV output circuits during network reconfiguration and fault restoration from the region control centre.
- Airport and transport infrastructure power management at Saudi international airports, where EMCO-equipped 3WL breakers on terminal electrical incomers and sub-distribution tie breakers enable centralised airport power management from the airport operations centre.
Industrial Supplier in Saudi Arabia
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